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Cheap flights from Ontario to Seoul from $454

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Seoul departing on 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Seoul

Cheap round-trip flights

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Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:20 pm - 6:19 pmGMP-ONT
38h 59m2 stops
$1,833Japan Airlines
Find Deal
Wed, Apr 15 - Thu, Apr 23
Multiple Airlines Logo
7:00 am - 10:05 pmONT-GMP
46h 05m2 stops
Multiple Airlines Logo
8:00 am - 6:17 pmGMP-ONT
27h 17m2 stops
$2,453Multiple Airlines
Find Deal
Fri, Nov 28 - Fri, Dec 5
Multiple Airlines Logo
11:59 pm - 10:05 pmONT-GMP
29h 06m2 stops
Multiple Airlines Logo
12:05 pm - 1:40 pmGMP-ONT
41h 35m2 stops
$2,743Multiple Airlines
Find Deal
Sun, Mar 1 - Sat, Mar 14
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
8:00 am - 3:54 pmGMP-ONT
24h 54m2 stops
$3,315Japan Airlines
Find Deal
Wed, Nov 19 - Fri, Nov 28
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
8:00 am - 3:54 pmGMP-ONT
24h 54m2 stops
$4,103Japan Airlines
Find Deal
Wed, Nov 19 - Sat, Nov 29
Multiple Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Multiple Airlines Logo
1:50 pm - 3:50 pmGMP-ONT
19h 00m1 stop
$4,774Multiple Airlines
Find Deal
Wed, Nov 19 - Fri, Nov 28
Multiple Airlines Logo
11:59 pm - 10:05 pmONT-GMP
29h 06m2 stops
Multiple Airlines Logo
12:05 pm - 6:16 pmGMP-ONT
23h 11m2 stops
$4,896Multiple Airlines
Find Deal
Fri, Dec 19 - Mon, Jan 5
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
7:40 pm - 3:08 pmGMP-ONT
36h 28m2 stops
$5,292Japan Airlines
Find Deal
Fri, Jan 16 - Fri, Jan 30
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
7:40 pm - 3:42 pmGMP-ONT
37h 02m2 stops
$6,672Japan Airlines
Find Deal
Fri, Dec 19 - Sun, Jan 4
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
12:05 pm - 3:42 pmGMP-ONT
20h 37m2 stops
$6,865Japan Airlines
Find Deal
Sat, Dec 20 - Sat, Dec 27

Japan Airlines flights from Ontario to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on Ontario to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Apr 15
ONT6:00 amOntario
23h 50m
2 stops
GMP9:50 pmSeoul Gimpo Intl
Apr 23
GMP7:20 pmSeoul Gimpo Intl
38h 59m
2 stops
ONT6:19 pmOntario
$1,833
Find similar
Japan Airlines
Nov 13
ONT6:00 amOntario
23h 05m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Nov 19
GMP12:05 pmSeoul Gimpo Intl
20h 12m
2 stops
ONT3:17 pmOntario
$2,664
Find similar
Japan Airlines
Nov 19
ONT6:00 amOntario
23h 05m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Nov 28
GMP8:00 amSeoul Gimpo Intl
24h 54m
2 stops
ONT3:54 pmOntario
$3,315
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Seoul Gimpo Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 7, 2025.
Use the filters below to find and compare flights from Ontario to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Wed 4/15

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Thu 4/23

7:20 pm-6:19 pm

2 stops38h 59m

$1,833

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Fri 11/28

7:00 am-10:05 pm

2 stops46h 05m

Seoul Gimpo Intl

Fri 12/5

8:00 am-6:17 pm

2 stops27h 17m

$2,453

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sun 3/1

11:59 pm-10:05 pm

2 stops29h 06m

Seoul Gimpo Intl

Sat 3/14

12:05 pm-1:40 pm

2 stops41h 35m

$2,743

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Wed 11/19

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Fri 11/28

8:00 am-3:54 pm

2 stops24h 54m

$3,315

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Wed 11/19

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Sat 11/29

8:00 am-3:54 pm

2 stops24h 54m

$4,103

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Wed 11/19

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Fri 11/28

1:50 pm-3:50 pm

1 stop19h 00m

$4,774

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Fri 12/19

11:59 pm-10:05 pm

2 stops29h 06m

Seoul Gimpo Intl

Mon 1/5

12:05 pm-6:16 pm

2 stops23h 11m

$4,896

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Fri 1/16

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Fri 1/30

7:40 pm-3:08 pm

2 stops36h 28m

$5,292

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Fri 12/19

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Sun 1/4

7:40 pm-3:42 pm

2 stops37h 02m

$6,672

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sat 12/20

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Sat 12/27

12:05 pm-3:42 pm

2 stops20h 37m

$6,865

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

How to get the cheapest flight ticket from Ontario to Seoul Gimpo Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Seoul Gimpo Intl Airport?

On average, the least expensive day to fly to Seoul Gimpo Intl Airport from Ontario is on a Monday. momondo users have found tickets for Monday departures for as low as $1,277. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Seoul Gimpo Intl Airport is Friday, with ticket prices averaging around $1,749.

What is the cheapest time of day to depart on your flight to Seoul Gimpo Intl Airport?

According to our data, the cheapest time of day to fly to Seoul Gimpo Intl Airport is in the evening. momondo users have found flights departing from Ontario to Seoul Gimpo Intl Airport in the evening for as low as $1,191. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seoul Gimpo Intl Airport is at noon when prices are around $1,733.

When to book flights from Ontario to Seoul Gimpo Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Seoul Gimpo Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Seoul Gimpo Intl Airport (ONT to GMP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Seoul Gimpo Intl Airport

Direct flights

None
There are no direct flights from Ontario to Seoul Gimpo Intl Airport. There are no popular flight routes from Ontario to Seoul Gimpo Intl Airport.
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  • How far is Ontario to Seoul Gimpo Intl by plane?

    A flight from Ontario to Seoul Gimpo Intl will travel around 5983.3 mi. By plane, this route typically takes 23h 05m.

  • When did momondo last update prices for flights from Ontario Airport to Seoul Gimpo Intl Airport?

    Prices for flights from Ontario Airport to Seoul Gimpo Intl Airport were last updated today.

  • How old do you have to be to fly from Ontario Airport to Seoul Gimpo Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Seoul Gimpo Intl Airport.

  • What documentation or ID do you need to fly to Seoul Gimpo Intl Airport?

    The necessary travel and health documents for your Seoul Gimpo Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Seoul?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Seoul. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Seoul with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seoul from Ontario with this policy.

How can momondo help me find flights from Ontario to Seoul?

momondo helps you find the best flight between Ontario and Seoul by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Seoul right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seoul, momondo offers a useful price alert feature which will track prices for flights to Seoul from Ontario and alert you when they change.

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